Buying and selling are a part of the trading process and selling for a profit is not wrong. So you should sell and then buy back at lower price in order to continue the cycle with the market.
Buying and selling is as hard as finding a hidden gem. it also requires a lot of knowledge and cannot be done without any knowledge. I prefer to look for potential new projects than choose to trade, trading is not necessarily as profitable as investing in hidden gems. Finding potential projects like sol or avax is hard, but it's more fun and less stressful than trading.
indeed it all depends on the choices and habits that have been made so far, some are happy with fast trading or maybe long. but there are also those who don't like it because, as you said, they really need knowledge in carrying out trading actions. Because without proper knowledge, it will obviously be eroded and experience losses that we don't want, even though in trading the risk of experiencing losses is something that will definitely happen and is a risk.
but investing in new projects is also not an easy thing if you don't know and want to study in detail each new project that we will disburse funds for investment. looking for potential new projects such as looking for diamonds on a sand beach and must be careful because they can be deceived by scam projects.
once again all are options that can be the best thing to do, returned to each individual.